chapter  5
36 Pages

Desert dust uptake-transport and deposition mechanisms – impacts of dust on radiation, clouds and precipitation

WithG. Kallos, P. Katsafados & C. Spyrou

Desert dust cycle is considered an important factor in the atmosphere and the ocean. Dust particles exert a significant number of impacts on radiative transfer, cloud formation and precipitation. Desert dust can reduce the incoming solar radiation on the surface, while at the same time warm middle tropospheric layers and affect stability and precipitation. Moreover it can assist in the formation of small water droplets and suppress precipitation or, in combination with sea salt and anthropogenic pollutants, form gigantic CCNs that behave like Ice Nucleus (IN) and enhance precipitation. Dust deposition can affect significantly the marine biological processes, by providing nutrients in the sea surface.